应用激光, 2019, 39 (4): 684, 网络出版: 2019-10-12
可调螺旋轴锥镜实现高阶贝塞尔光束
High-order Bessel Beams Realized by Tunable Helical Axicon
高阶贝塞尔光束 空间光调制器 全息图 螺旋相位板 轴锥镜 high-order Bessel beam spatial light modulator hologram spiral phase plate axicon
摘要
高阶贝塞尔光束被广泛应用在激光加工和精密测量等领域。针对高阶贝塞尔光束的生成方法, 通过空间光调制器加载高阶相位全息图, 代替真实的螺旋相位板和轴锥镜。理论分析锥镜组合和相位叠加两种模式下的光场分布, 设计实验对比两种模式下的光束调制情况。研究结果表明, 相位叠加法的调制效果优于锥镜组合法, 而且操作灵活、能减小加工误差, 是一种有效的高阶贝塞尔光束的生成方法。
Abstract
High-order Bessel beams are widely used in laser processing and precision measurement. For the realization of high-order Bessel beams, a spatial light modulator is used to load the high-order phase hologram instead of the real spiral phase plate and the axicon. The distribution of light field in two modes of axicon combination and phase superposition is analyzed theoretically, and the beam modulation in two modes is designed and compared experimentally. The results show that the modulation effect of the phase superposition method is better than that of the axicon combination method. Meanwhile, the operation is flexible and the processing error can be reduced. It is an effective method for generating high-order Bessel beams.
吕清花, 程壮, 翟中生, 王选择, 吕辉, 崔甲臣, 汪于涛. 可调螺旋轴锥镜实现高阶贝塞尔光束[J]. 应用激光, 2019, 39(4): 684. Lv Qinghua, Cheng Zhuang, Zhai Zhongsheng, Wang Xuanze, Hui Lv, Jiachen Cui, Wang Yutao. High-order Bessel Beams Realized by Tunable Helical Axicon[J]. APPLIED LASER, 2019, 39(4): 684.